Polymyalgia rheumatica and temporal arteritis with sacroiliitis and osteitis pubis.

Polymyalgia rheumatica (PMR) and temporal arteritis (TA) have been associated with a seronegative polyarthritis that can mimic rheumatoid arthritis. Sacroiliitis and osteitis pubis are most often encountered in the different types of spondyloarthropathy. However, sacroiliitis and osteitis pubis have rarely been described in patients with polymyalgia rheumatica and temporal arteritis. We present two patients, one with temporal arteritis and the other with polymyalgia rheumatica, who also had many features of a spondyloarthropathy, including sacroiliitis and osteitis pubis. In reviewing the literature, we found 30 other patients with a diagnosis of PMR who also had sacroiliitis and/or osteitis pubis. We propose that the inflammatory arthritis associated with polymyalgia rheumatica and temporal arteritis can involve the axial joints, resembling a spondyloarthropathy. It is important for the clinician to recognize that sacroiliitis and osteitis pubis have been associated with PMR and TA so that their radiographic presence does not dissuade the clinician from making the correct diagnosis.